Athens has become the focal point of a major European initiative for securing critical communications: SEEWQCI — the South-East Europe to Western Europe Quantum Communication Infrastructure. This flagship project establishes a ‘Quantum Communication Corridor’ linking Southeastern and Western Europe through secure, quantum-enabled digital networks.
A Cross-Border Quantum Backbone
SEEWQCI will interconnect national quantum communication infrastructures in Greece, Cyprus, Bulgaria, and the Netherlands. Leveraging existing optical fibre networks and ground-based satellite stations, the project aims to build a cross-border corridor for the secure exchange of sensitive data — reinforcing Europe’s digital sovereignty.
From Vision to Implementation
The initiative was officially launched at an inaugural meeting hosted by Greece’s Ministry of Digital Governance, marking the practical start of Phase II of the broader EuroQCI (European Quantum Communication Infrastructure) programme. With a total budget of €17.8 million — half co-funded by the EU’s Connecting Europe Facility — SEEWQCI integrates two technological layers: terrestrial optical fibre networks and satellite-based links, unified under a common operational and institutional framework.
Greek Leadership and Technical Maturity
The project is coordinated by GRNET (the Greek Research and Technology Network), with institutional support from Greece’s General Secretariat for Telecommunications and Posts. This leadership role underscores Greece’s technical readiness and central position within Europe’s emerging quantum communication ecosystem.
Broad Stakeholder Engagement
The launch event brought together 15 project partners and 7 supporting organisations from the four participating countries. Attendees included representatives from five ministries, five national cybersecurity authorities, four Security Operations Centres, nine research institutions, and three industrial companies. Discussions centred on interoperability, operational reliability, and political coherence — essential elements to translate quantum technologies into real-world services for both public and private sectors.
Satellite and Ground Integration
The European satellite EAGLE-1, alongside new optical ground stations to be installed in Greece, Cyprus, and the Netherlands, will strengthen the space-based pillar of EuroQCI — enabling secure connectivity even in maritime or island regions where terrestrial infrastructure is limited.
Quantum-Safe Cryptography in Action
At its core, SEEWQCI relies on Quantum Key Distribution (QKD) — a cryptographic method designed to withstand attacks from future quantum computers. It directly addresses the ‘harvest now, decrypt later’ threat, where adversaries collect encrypted data today to decode it later using advanced quantum systems.
Real-World Applications Across Sectors
The project plans to implement over 29 use cases across more than 35 network nodes — spanning government communications and diplomacy, healthcare infrastructure, financial institutions, and industrial control systems. Interoperability between diverse technology platforms, vendors, and national standards is a foundational requirement, ensuring seamless service delivery across borders and within the wider European ecosystem.